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Welcome to the M4 traffic search news page.
Helping you find the latest M4 traffic news and updates.
We hope that the traffic news will help you avoid traffic jams and roadworks.
Our traffic news is designed to provide you with traffic news in a clear and informative way.
You can use the filter options below to find the latest traffic news for the M4 journey you are planning to take.
13 matching items - showing 1-10 of 13 total available news items
M4 Westbound Jct 4B exit slip road lane 1 closure
00:0115 Sept 2026reported 6 min ago
- Location
- link road from M4 J4B westbound to M25 J15
- Direction
- Westbound
- Lanes closed
- Slip road closed
- Reason
- Roadworks
- Schedule
- 22:00 Mon 14 Sept 2026 → 05:30 Tue 15 Sept 2026
M4 Eastbound Jct 4B exit slip road closure
00:0115 Sept 2026reported 6 min ago
- Location
- link road from M4 J4B eastbound to M25 J15
- Direction
- Eastbound
- Lanes closed
- Carriageway closed
- Reason
- Roadworks
- Schedule
- 22:00 Mon 14 Sept 2026 → 05:30 Tue 15 Sept 2026
M4 Eastbound Jct 5 to Jct 4B lane 1,2 closure
00:0115 Sept 2026reported 6 min ago
- Location
- M4 eastbound within J4B
- Direction
- Eastbound
- Lanes closed
- Lane closures
- Reason
- Roadworks
- Schedule
- 22:00 Mon 14 Sept 2026 → 05:30 Tue 15 Sept 2026
M4 eastbound Jct 20 to Jct 19 lane closure 183/9-180/9
00:0115 Sept 2026reported 6 min ago
- Location
- M4 eastbound between J22 and J21
- Direction
- Eastbound
- Lanes closed
- Lane closures
- Reason
- Maintenance work
- Schedule
- 20:54 Mon 14 Sept 2026 → 06:00 Tue 15 Sept 2026
M4 eastbound lane 1 and 2 closure (59/3 to 57/3)
00:0115 Sept 2026reported 6 min ago
- Location
- M4 eastbound between J11 and J10
- Direction
- Eastbound
- Lanes closed
- Lane closures
- Reason
- Maintenance work
- Schedule
- 21:07 Mon 14 Sept 2026 → 06:00 Tue 15 Sept 2026
M4 eastbound Jct 10 exit slip road closure
00:0115 Sept 2026reported 6 min ago
- Location
- link road from M4 J10 eastbound to A329(M)
- Direction
- Eastbound
- Lanes closed
- Carriageway closed
- Reason
- Maintenance work
- Schedule
- 21:07 Mon 14 Sept 2026 → 06:00 Tue 15 Sept 2026
Hardshoulder closure
00:0115 Sept 2026reported 6 min ago
- Location
- M4 eastbound between J17 and J16
- Direction
- Eastbound
- Lanes closed
- Hard shoulder closed
- Reason
- Roadworks
- Schedule
- 23:59 Tue 27 Apr 2021 → 18:00 Fri 30 July 2027
M4 eastbound Jct 8/9 to Jct 7 carriageway closure
00:0115 Sept 2026reported 6 min ago
- Location
- M4 eastbound between J8 and J7
- Direction
- Eastbound
- Lanes closed
- Carriageway closed
- Reason
- Road improvement or upgrading
- Schedule
- 21:00 Mon 14 Sept 2026 → 06:00 Tue 15 Sept 2026
Forecast - not confirmed
M4 eastbound Jct 20 to Jct 19 lane closure 183/9-180/9
00:0115 Sept 2026reported 6 min ago
- Location
- M4 eastbound between J20 and J19
- Direction
- Eastbound
- Lanes closed
- Lane closures
- Reason
- Maintenance work
- Schedule
- 21:00 Mon 14 Sept 2026 → 06:00 Tue 15 Sept 2026
Forecast - not confirmed
M4 eastbound Jct 22 to Jct 21 lane closure 193/3-189/1
00:0115 Sept 2026reported 6 min ago
- Location
- M4 eastbound between J22 and J21
- Direction
- Eastbound
- Lanes closed
- Lane closures
- Reason
- Maintenance work
- Schedule
- 21:00 Mon 14 Sept 2026 → 06:00 Tue 15 Sept 2026
Forecast - not confirmed
Updated 00:07 Tue 15 Sept 2026
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How to find the latest M4 traffic news
Our live M4 feed updates throughout the day with the latest reports on delays, roadworks, accidents, closures and congestion along the M4 motorway. Search by junction number and direction — eastbound or westbound — to focus on the stretch you’re travelling, whether that’s the M25 interchange at Junction 4b, the Severn crossing, the M5 at Almondsbury, or the run into Cardiff and Swansea. A quick check before you leave can save you sitting in avoidable traffic.
Why M4 traffic news changes along the motorway
The Department for Transport counts M4 traffic hour by hour and end to end. What it shows is that the latest M4 news means something different depending on where you are joining the motorway today.
156,491
M4 vehicles a day
at the busiest point, junction 4 by Heathrow — the London commuter end of the M4, where 81% of the traffic is cars.
128,594
a day at Bristol
on the M4 at the M4/M5 interchange — fewer vehicles, but 11,167 lorries and 24,926 vans. The same motorway, carrying a very different kind of traffic.
32%
the M4 rush-hour swing
between the busiest M4 hour (7am) and the quietest (11am) at junction 4. The M4 has a genuine peak, so timing your journey actually helps here.
81
M4 count points
measure this motorway from London to South Wales. It is one of the most closely watched roads in the country, and every M4 accident, delay and roadworks report we publish comes from that network.
So an M4 delay at junction 4 and an M4 delay at junction 19 are not the same problem. That is why this page carries all the latest M4 traffic news together — accidents, crashes, roadworks and lane closures — so you can find the ones on your stretch of the M4 motorway today rather than reading about somebody else’s.
Hourly figures are from the Department for Transport’s own M4 count point beside junction 4, counted on 3 September 2025, published 20 May 2026. Daily figures are Average Annual Daily Flow for 2025.